【摘要】 为综合评价东北地区大豆品种的耐密抗倒特性，筛选耐密抗倒高产大豆品种，本研究以75份大豆品种为试验材料，设置常规密度20万株/hm~2和高密度30万株/hm~2处理，测定关键生育期倒伏相关指标以及成熟期农艺性状及产量性状指标。以高密度与常规密度条件下各耐密抗倒相关性状比值为基础数据，通过主成分分析和隶属函数分析对大豆耐密抗倒性进行综合评价。结果表明，24个耐密抗倒性状相关的单项指标可转化为7个相对独立的综合指标，累计贡献率72.041%，同时结合各品种的产量及倒伏级别，进一步筛选出黑农43等8份耐密抗倒高产材料，为东北大豆密植高产栽培和耐密品种选育提供重要参考依据。更多还原

【Abstract】 In order to comprehensively evaluate the density and lodging resistance of soybean varieties in Northeast China and screen the density and lodging resistance and high-yield soybean varieties, this study took 75 soybean varieties as experimental materials, and set two treatments of the conventional density 200,000 plants·ha^-1 and highdensity 300,000 plants/ha to determine the lodging related indexes of key growth period and agronomic and yield traits of maturity period. Based on the ratio of the related traits of high density and conventional density, the density and lodging resistance of soybean was comprehensively evaluated by principal component analysis and membership function analysis. The results showed that 24 individual indexes related to the density and the lodging resistance traits could be transformed into 7 relatively independent comprehensive indicators, and the cumulative contribution rate of the traits was 72.041%, and combined with the yield and lodging level of each variety, 8 high-yield materials such as Heinong 43 were further screened out, which provided an important reference for the dense planting and high-yield cultivation and the breeding of dense-tolerant soybean varieties in Northeast China.更多还原